Power-shovel



POWER S'HOVEL. APPLICATION FILED Nov.*3. 19 19.

PatetedSept. 27, 1921.

5 SHEETS-SHEET l.

C. S. JOHNSON..

POWER SHOVEL.

APPLlCAT'lON HLED NOV.13. 1919.

Patented Sept. 27, 1921.

5 SH'EETS-SHEET 2.

C. S. IOHNSON.

POWER SHOVEL. APPLICATlON FILED NOV.13, 1919.

1 ,3 91,737 PatentedSept. 27,1921.

5 SHEETS-SHEET 3.

C. S. JOHNSON. POWER SHOVEL. APPLICATION FILED NOV. 13. 19 19.

PatentedS ept. 27; 1921.

5 SHETS-SHEET 4.

C. S. JOHNSON.

POWER SHOVEL.

APPLICATION FlLED N0V.13 1919.

. A `vzm' UNITED sTAT-:s

CHARLES S. JOHNSOiN' OF TOLEDQ, OHIO.

rowER sHovEL,

Specificatioi of Letters Patent. I Patented Sept. 2 7, 1921.

Application filed November 13, 1919. serial No. 3373754.

To all whom it may concem Be it known that I, CHARLEs S. JoHNsoN,

a citizen of the United States, and a resident of Toledo, in the county of Lucas and State of Ohio, have invented a certain new and useful Power-Shovel; and-I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertans to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a' part of this specification. i

This invention relates to improvements in' power .shovels, locomotive cranes, and other power excavating and hoisting machines.

An object of the invention is to provide a rigd and non-warping truck frame in machines of the character described, to support I the revol-ving structure which carries the boom and actuating machinery.

Another object of the invention is to provide a rigid and non-warping revolving f'ame or structure for the actuating machinery, boom, and boom supporting rods and guys of machines of this character. Another object of the invention is to provide an improved and simple mounting for the rollers upon which the revolving frame rests and rotates and whereby the rollers may be readily removed.

It is known that machinesof this character should have truck frames which successfully resist Warping in order, at all times, and independently of the character of the ground `otrack upon which the truck rests, to provide aflat path or track for the rollers upon which the rcvolving frame or structure rests and revolves, and also to prevent breaking the path. The truck frame embodying a feature of my invention is peculiarly adapted to resist warping when supported at two diagonally opposte corners, as frequently occurs during operation. The strength to 'esist vvarping., is obtained by combining the bcndimg strength of the component beams rather than by the usual practice of utilizing the torsional strength of the component beams.

I t is also well known that machines of this character should have revolving frames or structures which successfully .resist warping and deflecting in order to provide a sound and stable base'for the actuating machine-y. The novel combination of parts which I employ in my revolving frame provides the.

pose. The invention is fully described in the `following specification, and while, in its "rea-der' aspect, it in numerous forms and machines, I have, in the accompanying drawings, of illustration, embodied the same in a power shovel, in which' drawings Figure -1 is a side elevation of a power shovel embodying the invention, with' the' 'housing in longitudinal vertical section. Fg. 2 is a partial top plan view thereof with the housing in horizontal section. Fig. 3 s a top planvie'w of the truck frame with parts broken awa. Fig. 4 is a section on the line 4-4 in F ig. 3. -F i 5 isa 'section on the line 5-.-5 in F ig. 4. %Tig 6 is a perspectve View of'a'part of the truck frame. Fxj is an inverted plan viewof the revo vng structure; F ig. 8 is an enlarged ,section on the line' 8-8 in Fi 7. Fi 9 is a section on the line 9-9 in ig. 8. lg. 10 is an enlarged section jonv the line 10-10 in Fg. -1, with parts removed. Fi 11 is an enlarged partial section on the me 11--11' in F ig. 1, and Fig. 12 is a diagonal sectional illustration of the controlling clutch.

Referring to the drawings, A is a truck upon which the frame B is mounted for horizontal revolving movements; C is a housing mounted on the frame B and inclosing the actuating machinery; D is a boom pr'ojecting from the revolving frame B, and E is the shovel, the handle F of which is connected to the protracting and retracting means of the machine;

Thetframe of the truck A (Figs. 3, 4:, 5

consisting of two longitudinally extending spaced apart beams 111 and 112, two transversely extending spaced apartbeams 213 and 214 connected at their ends to the longitudinal beams, and together with the Iongitudinal beams forming a quadrangle. A member 113 is centrally placed in the quadrangle and has integrally formed beam portions 125 in line with the diagonals of the quadrangle and connected to the respective diagonals or corners of the quadrangle by is capable of embodiment' for the purpose' necessary strength for this purthe four diagonally disposed :beams p 116. 117 and 118. Mem ers 123 of strap form (Figs. 3 and 4) extend longitudinally of the four diagonally disposed beams at top and bottom thereof and fasten such 95 and 6) comprises a non-warping structure J beams to the center member 113 and to the longitudinal and lateral beams at the corners thereof. Each of the four diagonal beams is also provided at its inner end at each side thereof with angle brackets or brace members 110 which fit into recesses formed in the centralmember 113, and have for their function to resist the vertical shearing force between the central member and the diagonal beams, thereby coperating with the other features of the frame to provide a rigid Construction.

By connecting the diagonal beams, manner described, to thebeam portions 125 of thecentral member 113 and to the corners of th quadrangular frame, a structure is obtained which in function is equivalent to continuous and intersecting diagonal beams in a quadrangle of beams, and which in Construction is peculiarly strong in re sisting warping, as is readily apparent.

The truck is provided with four supporting wheels 15 (Fig. 1) .which travel on rails 16 and are c'arried by axles 21 journaled in suitable bearings at the under side of the truck frame. A propelling rotation is delivered to one of the axles 21 from a centrally disposed Vertical shaft 50 through an intermediate shaft 18 and bevel gear sets 51, 17 (Fig. 1) and 19, 20 (Fig. 3). The shaft 50 is journaled in a hearing 124 provided centrally through th truck frame member 113 and is connected at its upper end to driving mechanism carried by the revolving frame B, as hereinafter described.

The revolving frame or structure B comprises a rigid non-warping structure con-.

sisting of a base member 61 (Fig. 7) hav-` ing` a center journal box 66 through which the shaft 50 extends, and having radially disposed beams or arms 62, 63, 64 and 65. The forward beams 63 and 64 are rigidly connected and braced at their forward ends by an integral cross beam 69 having the boom supporting bracket 81 at its center and having the boom guy-rod anchor brackets 83 at its opposit ends. A web is providedbetween the two rear arms 62 and 65 and this is formed with box 80. A plate or platform member 25 is mounted on and riveted or' otherwise suit'- ably fastened to the base member 61, and a pair extending beams 23 and 24 are mounted on this plate and riveted or otherwise suitably fastened thereto and to the respective ends of the base member arms. The housing C is mounted on the base plate 25.

Each radiating arm of the base frame 61 is formed at its outer end with a set of integral brackets 67 and 68 radially spaced from each other and adapted for receiving bolts 7 5 at their lower ends for attaching to said brackets the respective flattened ends of a shaft 74 on which a roller 70 is mountin the volving sets, the upper a vertical journal of transversely spaced longitudinally' ed intermediate the brackets, as best shown in Figs. 8 and 9. The rollers 70 have their peripheries of conical form and adapted to rest on a circular track 129 mounted on the top of the truck frame A in concentric relation to the shaft 50 journaled in the center of said frame. The 'rollers 70 are prevented' from outward movements on the respective shafts 74 by collars 72 thereon.

The boom D has ball and socket joint connection with the forward end of the revolving frame B, being rovided in the present instance with a ball- 'ke projection 82 at its inner end which is received by the socket member 81 on the forward end of the base frame 61. The boom is laterally braced by guy rods 84 and 85 rojecting from the anchor brackets 83 on tiie base-frame 61 and connected at their outer ends to the respective sides of the boom adjacent to its outer end. The boom is supported at its forward end in desired inclined position by guy rods 98 and 99 (Figs. 1 and 10), which are connected at. their outer endsto the top side of within the housing' B. This cross-bar' is rigidly supported and braced above the reframe B bythe two sets of truss members 89, and 91 (Fig. 1), which are ;connected at their uppeends to the cross bar 93 and have the r lower ends s aced apart lo-ngitudinally of the revolving rame and connected to the respective longtudinal beam 23,' 24 of such frame, as at 92. Each set of truss members 89, 90 and 91 is laterv ally braced relative to the cross-bar 93 by diagonal brace rods 94 and 95 projecting at therlower ends throu h bearings 96 in the respective center 'mem ers 90 of the truss ing connected to a bracket 97 on the central portion of the cross-bar 93 and spaced from the adjacent ends of the guy rods 98.and 99 by sleeves 101 (Fig, 10).

The revolving frame B carries a plurality of crossshafts 30, 33, 37, 44 and 52 which are transversely spaced from each other longitudinall of the frame and are journaled at their en s in suitable bearings carried by the respective beams 23 and 24 of said frame. A motor 27 is mounted on the base plate 25 at the rear end portion of the frame and this shaft is in drivmg connection with the shaft 30 through gears 28 and 29, and the shaft 30 is in turn in driving connection with aH of the remaining shafts of the set through a train of gears 31. In the present instance, the shafts, 33, 37, 44 and 52 are all geared to be driven at the same speed and the gearing between the motor and the gear train is such as to eflect the desired reduction in the speed of driving of said shafts over the speed of rotation of the motor shaft.

The shaft 33 carries a loosely mounted ends of said diagonal rods bedrum 35 controlled by a clutch 36 on the shaft, and this drum has two sections of different diameter on which the rearend of the cable 150 for controlling the raising and lowering movements of the bucket E is adapted to wind.

The shaft 37 carrie's two loose bevel gears 38, 39 adapted to be respectively connected to the shaft for rotation therewith through control clutches 40 and 41 and each meshing with a bevel gear 42 at opposite sides of its axis. The gear 42 is disposed beneath the shaft 37 and is carried at the-upper end of a vertical shaft 43 which extends down through the journal box 80 in the base frame 61 and carries a pinion 126 at its lower end in mesh with an internal gear 128 fixed to the top of the truck frame A in concentric relation to the shaft 50. It is thus evident that a turning of the revolving frame B relative to the truck frame A may be effected in the desired direction b connecting the proper gear 38, 39 with t e shaft 37 through the medium of its clutch.

The shaft 44 has bevel gears 45 and 46 loosely mounted thereon and in mesh with a gear 49 at opposite sides of its axis, which gear is fixed to the upper end of the shaft 50. The gears 45. and 46 are connected to the shaft 44 through the medium ofrespective clutches 47 and 48. It is thus evident that the driving of the shaft 50 in either direction for eifecting a forward or backward movement of the truck A on this track may be efi'ected by throwing either clutch 47 p or 48 in operative position.

. The shaft 52 has two drums 53 and 54 loosely mounted thereon and adapted to be connected to the shaft for turning movements therewith by the axial shifting of an intermediate clutch sleeve 57 which is fcathered on the shaft and has clutch members 55 and 56 at its ends for clutch engagement with the respective drums 53 and 54 (Figs. 2 and 12). The shifting of the sleeve 57 is controlled by a lever 58. Cables 59 and 60 wind respectively at their rear ends in the same direction, in the present instance, on the drums 53 and 54, and wind in opposite directions at their forward ends on respective drums 134 and 135 keyed to the respective ends of a cross shaft 133 journaled in suitable bearings on the top of the boom D adjaccnt to its center. A yoke 137 of inverted U-form has the ends of its arms provided with bearings 136 for loosely receiving the shaft 133' intermediate the drums 134 and 135 and a gear 140 is -keyed to the shaft 133 between the arms of the yoke 137. The bucket E has a handle F projecting rearwardly therefrom through the boom D and through the' opening above the gear 140 formed by the yoke 137. The handle F is providedon its under side with a rack 139, which is retained in mesh with the gear 140 by the yoke 137, as is apprarent, It is evident that the bucket handle may be projected and. retracted by a driving of one or the other of the drums 53 and 64 so that the desired rotation may be imparted to the shaft 133 through the active cable 59 or 60 and its coacting drum 134 or 135.

A raisin or lowering of the bucket -E a winding up or paying out of the cable 150, which connects. sheaves 146 and 148 on the bucket and outer end of the boom respective'ly, as is well understood in the art.

'It is-evident that I have provided truck and revolving frames which are of a construction adapted to lend rigidity thereto and to prevent rotating due touneven strains; that I have provided a sim le and efficient truss structure for maintainng the boom in elevated position, and that I have provided numerous other improved features of construction in a machine of the class described, which simplifies and strengthens its constructions and enhances* its practicabil'ity and commercial value.

'While I have herein shown and described one specific embodiment of my invention forillustrative purposes and have disclosed and described in detail the constructior and arrangement incidental to one specific application thereof, it is to be understood that the invention is not limited to the mere detail or relative arrangement of the parts, but that deviations from the .illustrated form or embodiment. of the invention may be made without departing from the spirit of the clains.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is,-

1. A truck frame having in structural combination four beams connected together and forming a quadrangle, a member centrally placed in the quadrangle and having recesses in its sides, four beams diagonally placed in the quadrangle and connecting the corners thereof with the centrally placed member, means for rigidly connecting the diagonal beams with the beams forming the quadrangle and with the center member, and angular brackets fixed to ,the inner end portions of the diagonal beams and fitting in the recesses in the central member.

2. A truck frame having in structural combination four beams connected together to form a quadrangle, a member centraily placed in the quadrangle forming a vertical journal box and having integral radiating portions in line with the corners of the quadrangle, four beams diagonally placed in the quadrangle and in longitudinal alnement with said radiating portions and connecting the corners of the quadrangle with the center member, and means rigidly connecting the diagonal beams to the respective corners of the quadrangle and to the center member. a

3. A\ truck frame having in structural combination four beams connected to forn a quadrangle, a member centrally placed in the quadrangle and forming a verticaljour- .nal hearing, and four radatjng portions in line with the corners of the quadrangle, said member also having recesses n its sdes 'at the ends of said radiating portions, diagbeams spaced apart and connected at theirends to the longitudinal beams and forming therewith a quadrangle, diagonally placed beams disposed within the diagonal and joining the corners thereof, means rigidly connecting the inner ends of the diagona'l beams, and means rigidly connecting the several beams at their points of juncture".

5. In combination, in a machine of the class described, a base member forming a center journal hearing with radially disposed beam sections and roller supporting brackets at the ends of the beam sections and having a cross beam section, a plate mounted on the base member, a pair of transversely spaced beams mounted on the plate, a three member truss structure rising from each beam at three points longitudinally thereof, the three members of 'each truss structure having a common juncture point at their upper ends, a cross-member connecting the juncture ends of the truss structure to the juncture ends of the other truss structure, diagonal braces from the cross-member to each truss structure, a boomprojecting from the base member, and truss rods projecting from the cross-member of the truss structure and attached to the boom to support the same.

6. In combination, in a machine of the class described, a revolving frame, a boom projecting therefrom, a truss structure mounted on said frame and comprsing two transversely spaced sets of truss rods with the rods of each set rising from the iframe and having a common ]uncture point at their upper ends, a cross-member carred by and connecting the two sets at the juncture points of their rods, and guy rods connecting said cross-member to the outer' end portion of the boom.

7-( In combination, in a machine of the class described, a truck frame having an annular track on its top, a revolving frame mounted over said truck frame and having a base member forming radiating'arms, a vertical journal hearing atone side of its center, brackets depending from each of said arms adjacent its outer end, shafts carried by said brackets in radial relation to the frame center, rollers mounted on said shafts and resting on said track, an annular gear mounted on the truck frame concentric to said track, a shaft journaled in the bearing of said base member and having driving connection with said gear, and means carried by the revolving frame for driving said shaft.

8. In combination, in a machine of the class described, a revolving structure base having a plurality of integrally formed pairs of brackets with flat perforated bottom surfaces, a shaft mounted beneath each pair of brackets and having flattened end portions and a central journal portion, bolts extending through the bracket perforations and rigidly connecting the shaft ends to the brackets and a roller mounted on the journal portion of each shaft between the brackets.

9. In a machine of the class described, a structure mounted for revolving movements and having a base member, a plurality of pairs of brackets formed in and depending from the base member and arranged in circular series, said brackets each having flat and perforated bottom surfaces, a shaft for each pair of brackets provided with a central journal section, an adjoining collar and ends formed to mate the bottom surfaces of the brackets, bolts projecting through the bracket perforations and the flattened ends of the shaft to rigidly connect the shaftto the brackets, and a roller mounted on the journal portion of each shaft and having its outer end thrust against the shaft collar. In testimony whereof I have hereunto signed my name to this specification.

CHARLES S. J OHNSO'N. 

